The R1 8" Marine Speaker is the larger and louder counterpart to the smaller R1 6.5" Marine Speaker. The shallow mounting depth combined with the 10" flying lead connector, give this speaker more mounting options with one of the easiest installs you could ever hope for. They pair perfectly with our R1 Tower Speakers, R1 Marine Amplifiers, and R1 Marine Subwoofers, now get loud! Continuous Power (RMS) 100 WattsPeak Power (RMS) 200 WattsSensitivity 90 dB @ 1W/1MFrequency Response (+ / - 3 dB) 50 Hz - 20 kHzImpedance 4Nominal Diameter 8 in 20.32 cmOverall Diameter 9.21 in 23.4 cmBasket Diameter 7.075 in 18.0 cmMounting Depth 3.325 in 8.45 cmGrill Height 1.5 in 3.8 cm